“…The two architectures in Figures 3(a Figure 3(a) shows an early fusion architecture, which performs feature extraction and feature fusion simultaneously, followed by image reconstruction in an end-to-end manner. Owing to its effectiveness in removing the correlation between two source images, many algorithms [25], [26], [29], [30], [38], [42], [44], [51], [52] using this architecture have recently been proposed. In particular, several researches [38], [44] have focused on designing network architectures for effective extraction of useful features from source images and their fusion.…”